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Finding the Fourth Proportional to 3,609.95, 4,981.82 and 2,118.95

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Solution

The fourth proportional to 3,609.95, 4,981.82 and 2,118.95 is: 2,924.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,609.95 : 4,981.82 = 2,118.95 : x
  2. Step 2: Convert to fraction form
    3,609.95/4,981.82 = 2,118.95/x
  3. Step 3: Cross multiply
    3,609.95x = 4,981.82 × 2,118.95
  4. Step 4: Simplify right side
    3,609.95x = 10,556,191.99
  5. Step 5: Solve for x
    x = 10,556,191.99/3,609.95
  6. Step 6: Final answer
    x = 2,924.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.